comparing FB-DIMMs

Please note: Apple created a more robust thermal specification for the Mac Pro FB-DIMM heat sinks that provide more efficient cooling than many other FB-DIMMs. These FB-DIMMs require less airflow to stay cool and allow the internal fans to spin at slower speeds, improving system acoustics. FB-DIMMs made by other manufacturers that do not include a sufficient heat sink may cause the fans to run faster (and louder) or the memory chips to run slower so as not to overheat.

Is this true regarding the FB-DIMMs Apple creates compared to other manufacturers? Has anyone tested the two?

Depends where you live as to what is available. In the UK the only ones I am aware of are from Crucial. And yes, they are much cheaper than Apple, but they are still much more expensive than "normal" RAM.

canadaRAM is correct. A good reseller will not sell any RAM that they think will not work right.

A few months ago when I first added RAM to my Mac Pro I went to the Apple Store. At that time any RAM that was garrentied to complie with Apple spec was as expencive for more then Apple. A few weeks ago I realized that I coould use some more RAM. Now rules to quilify RAM to Apple spec's was revised. Making it easier for a company to make RAM that will work well in the Mac Pro. The first Apple specification was not very specific.

I went to OWC and bought 2GB of RAM. I got the exact RAM modules used by Apple and heat sinks that complied with Apple.(and they looked quite similar) I decided to go for this when I noticed

A) Lifetime warrenty on the RAM

B) 14 day return if your not happy with the RAM

So I was able to plug the RAM in and monitor the temp of the RAM bay and know that if I did not like the heat increase I could send the RAM back for a full refund.

I only had a 10 degree increase on temp that I can atest to just having 2 more sticks in the computer.....

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